![Why only a single database?
•Single point of failure
•More expensive
•Cannot grow in small steps
•Scaling up is failing up [1]
[1] Scalability rules: 50 principles for Scaling Web Sites](https://image.slidesharecdn.com/henrybeen-database-per-tenantwith50kdatabases-180418100944/85/Henry-been-database-per-tenant-with-50k-databases-5-320.jpg)
Henry been database-per-tenant with 50k databases
- 1. Buidling a multi-tenant application using 50k databases Henry Been ROME - APRIL 13/14 2018
- 3. Server 1 Server 2 Server 3 Server 4 Server n Database loadbalancing
- 5. Why only a single database? •Single point of failure •More expensive •Cannot grow in small steps •Scaling up is failing up [1] [1] Scalability rules: 50 principles for Scaling Web Sites
- 6. Server 1 Server 2 Server 3 Server 4 Server n DB loadbalancing DB DB DB DB DB
- 7. Using a database per tenant •Unlimited scaleability •Isolation of failure •Roughly 2,5 times cheaper •100% tenant isolation •Better fit for legacy applications
- 8. 100% tenant isolation •Snapshot backup/restore •Recover to point in time •Compliance •Limited authorization risks
- 9. Better fit for legacy applications •Designed for single tenant, single db •Allows for move to the cloud •Use case I will present
- 10. Disclaimer!
- 11. "The Long Road Ahead" (CC BY-NC-ND 2.0) by CC Chapman
- 12. SnelStart How it happened at "Incidental Expenses" (CC BY-NC 2.0) by tim ellis
- 26. So…. what do I need? "tools" (CC BY-NC-ND 2.0) by ᴾᴴᴵᴸ
- 27. Services platform •Login •Retrieve connection string •Create tenant •Destroy tenant •Backup tenant •Restore tenant
- 28. Catalog •Customers / Accounts •Users •Tenants •Authorizations •Operations • Create / destroy • Backup/restore • Etc
- 29. User Directory
- 30. A pointer on operations •Modeled as a state machine, with steps •Designed for failure and resume •Properties •Retry •Idempotentcy •Reentrant •Queue vs. database
- 32. User Directory
- 33. Demo time! "Mad Science!" (CC BY-NC 2.0) by FallenPegasus
- 35. •Unlimited scaleability •Isolation of failure •Migration of legacy •More effort to build! Wich way forward?
- 36. "Balanced Stones.Sausalito" (CC BY-SA 2.0) by DrPleishner
- 37. HENRY BEEN Independent geek E: consultancy@henrybeen.nl T: @henry_been L: linkedin.com/in/henrybeen W: henrybeen.nl Do try this at home!